What code should you check to determine the cleaning process for an item you are not familiar with?

The code you should check to determine the cleaning process for an unfamiliar item is the cleaning suitability code. This code is specifically designed to provide guidance on how to appropriately clean different types of items while considering their materials, finishes, and any special requirements they may have. The cleaning suitability code will detail the recommended cleaning methods and solutions to ensure that the item is both preserved and properly maintained without causing damage.

In contrast, the item handling code primarily focuses on the procedures for physically handling or transporting items rather than their cleaning protocols. The 12-digit packaging code generally pertains to the packaging specifications and is not specifically related to cleaning. The defect evaluation code is used to assess the condition of an item for damage or wear, which does not directly inform cleaning processes.